Measuring and recording the mass of a clean, dry crucible
Measuring about 1.5 of the compound in the crucible
Measuring and recording the mass of the crucible and compound
The crucible gently heating
The crucible cooling
Measuring and recording mass of the crucible and contents
Reheating the crucible
The crucible cooling again
Re-measuring and recording the mass of the crucible and contents
JOELY OSWALD AND LIZ LEFEVER
Graphing Periodic Trends
Graph 1
Graph 2
Graph 3
Graph 4
Mendeleev: Predicting the Future?
Purpose: To predict the density of the element Germanium by determining the density of the other metals found in the same column of the periodic table.
Data:
Element
Trial
mass (g)
Volume Change (mL)
Density (g/mL)
Average Density (g/mL)
Silicon
1
2
3
2.2 g
4.14 g
6.13 g
1.0 mL
2.0 mL
3.0 mL
2.2 g/mL
2.1 g/mL
2.0 g/mL
2.1 g/mL
Tin
1
2
3
5.33 g
10.49 g
17.00 g
1.0 mL
2.0 mL
3.0 mL
5.2 g/mL
5.2 g/mL
5.6 g/mL
5.3 g/mL
Lead
1
2
3
11.5 g
25.70 g
35.55 g
1.0 mL
2.0 mL
3.0 mL
11.5 g/mL
12.9 g/mL
13.3 g/mL
12.5 g/mL
Element
Period
Average Density
Si
3
2.2 g/mL
Sn
5
5.3 g/mL
Pb
6
12.7 g/mL
Best Fit Line Equation: y = 3.2214x - 8.3 Correlation: .832 Predicted Density of the period 4 element (Germanium): 4.5 g/mL
Conclusions:
1. 5.0 - 4.5 = .5 / 5.0 = .1 x 100 = 10%
2. Si - 2.33 - 2.2 = .13 / 2.33 = 0.6 x 100 = 6%
Sn - 7.31 - 5.3 = 2.01 / 7.31 = .27 x 100 = 27%
Pb - 11.35 - 17.7 = 1.35 / 11.35 = .11 x 100 = 11%
3. a We would get a lower volume and then that would mean we would get a higher density.
b We would get a higher volume and then that would mean we would get a lower density.
Lavoisier a liar? Can matter really neither be created nor destroyed?
Purpose: to prove that matter is conserved
Data collected before reaction:
Reactants - Mass (g)
Mass of empty beaker A: 29.5956 g
Mass of compound placed in beaker A: .7495 g
Mass of empty beaker B: 28.4926 g
Mass of compound placed in beaker B: 1.2003 g
Total mass of compounds placed in beaker A & B: 1.9498 g
Mass of clean filter paper: .8826 g
Data collected after the water is boiled off and beakers are allowed to cool:
Products - Mass (g)
Mass of beaker A & filter with compound: 31.3959 g
Mass of compound recovered in beaker A: .9177 g
Mass of beaker B + compound: 29.6035 g
Mass of recovered compound in beaker B: 1.1109 g
Total mass of both A&B compounds: 2.0286 g
Total Mass of compounds before the reaction: 1.9498 g
Total Mass of compounds after the reaction: 2.0286 g
Conclusion: Lavoisier is not a liar because when you find the percent error for the total mass of the compounds before and after the reaction it is 4% which is in the 10% limit for error and it proves that matter can neither be created nor destroyed.
I have two dogs named Layla and Utley.
this is my selfie
The graph shows that as the height increases so does the shoe size. If you have the person's height you can figure out the shoe size or vice versa by plugging in what you have into the best fit line equation. The suspect to bring in is Penelope Paige because she has the smallest feet out of the 3 suspects. Evidence shows that the foot prints were smeared. A person with small foot prints can smear their foot prints into big ones, but a person with big foot prints can't smear their foot prints into small ones.
Drinking Water Contamination Kit
Determination of a Hydrate
JOELY OSWALD AND LIZ LEFEVER
Graphing Periodic Trends
Graph 1
Graph 2
Graph 3
Graph 4
Mendeleev: Predicting the Future?
Purpose: To predict the density of the element Germanium by determining the density of the other metals found in the same column of the periodic table.
Data:
2
3
4.14 g
6.13 g
2.0 mL
3.0 mL
2.1 g/mL
2.0 g/mL
2
3
10.49 g
17.00 g
2.0 mL
3.0 mL
5.2 g/mL
5.6 g/mL
2
3
25.70 g
35.55 g
2.0 mL
3.0 mL
12.9 g/mL
13.3 g/mL
Best Fit Line Equation: y = 3.2214x - 8.3
Correlation: .832
Predicted Density of the period 4 element (Germanium): 4.5 g/mL
Conclusions:
1. 5.0 - 4.5 = .5 / 5.0 = .1 x 100 = 10%
2. Si - 2.33 - 2.2 = .13 / 2.33 = 0.6 x 100 = 6%
Sn - 7.31 - 5.3 = 2.01 / 7.31 = .27 x 100 = 27%
Pb - 11.35 - 17.7 = 1.35 / 11.35 = .11 x 100 = 11%
3. a We would get a lower volume and then that would mean we would get a higher density.
b We would get a higher volume and then that would mean we would get a lower density.
Lavoisier a liar? Can matter really neither be created nor destroyed?
Purpose: to prove that matter is conserved
Data collected before reaction:
Reactants - Mass (g)
Mass of empty beaker A: 29.5956 g
Mass of compound placed in beaker A: .7495 g
Mass of empty beaker B: 28.4926 g
Mass of compound placed in beaker B: 1.2003 g
Total mass of compounds placed in beaker A & B: 1.9498 g
Mass of clean filter paper: .8826 g
Data collected after the water is boiled off and beakers are allowed to cool:
Products - Mass (g)
Mass of beaker A & filter with compound: 31.3959 g
Mass of compound recovered in beaker A: .9177 g
Mass of beaker B + compound: 29.6035 g
Mass of recovered compound in beaker B: 1.1109 g
Total mass of both A&B compounds: 2.0286 g
Total Mass of compounds before the reaction: 1.9498 g
Total Mass of compounds after the reaction: 2.0286 g
Conclusion: Lavoisier is not a liar because when you find the percent error for the total mass of the compounds before and after the reaction it is 4% which is in the 10% limit for error and it proves that matter can neither be created nor destroyed.
I have two dogs named Layla and Utley.
The graph shows that as the height increases so does the shoe size. If you have the person's height you can figure out the shoe size or vice versa by plugging in what you have into the best fit line equation. The suspect to bring in is Penelope Paige because she has the smallest feet out of the 3 suspects. Evidence shows that the foot prints were smeared. A person with small foot prints can smear their foot prints into big ones, but a person with big foot prints can't smear their foot prints into small ones.